Ophthalmic mounting



June 1 5 1926.

E. D. TILLYER OPHTHALMIC MOUNTING Filed Feb. I, 1926 3mm-0@ l dgarfl). ginger:

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BDG-AR D. TILLYER, OF SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOR T0 AMERICAN OPTICAL COMPANY, OF SOUTHBRIDGE, MASSACI-IU'SETTS, A VOLUNTARY ASSOCIA TION 0F MASSACHUSETTS.

OPHTIIALMIC MOUNTING.

Application led February to provide simple, efficient and inexpensive means by which a prescription lens may be held in a protection mounting having a protection non-prescription lens.

Another object of the invention is to provide means for holding a prescription lens which may be simply put in place in a protection mounting having a non-prescription protection lens. p

Another object of the invention is to provide simple means for putting in and taking out a prescription lens in a mounting baving ay protection non-prescription lens.

Another object of the invention is to provide means whereby the non-prescription lens will hold and retain in place the means for holding the prescription lens used in conjunction therewith.

Other objects and advantages of the invention should become apparent from the following description taken in connection with the accompanying drawings, the preferred form only being shown by way of illustration.

It is apparent that many modifications of the detailed construction and arrangement of parts may be made without departing from the spirit of the invention as eXpresed in the accompanying claims, and I, therefore, do not wish to be limited to the devices shown and described.

Referring to the drawings wherein similar characters designate vcorresponding parts throughout Figure 1 is a front view of a mounting embodying the invention;

Figure 2 is a cross section on line 2-2 of Figure 1;

Figure 3 is a perspective view of the frame for holding a prescription lens;

Figure 4 is a View similarto Figure 2 wherein the various parts of the mounting are shown in separated position.

Prior to my invention protection glasses have been used in conjunction with the ordinary prescription lenses, but it has been a difficult and expensive matter to provide means for holding a prescription lens where- 1, 1926. Serial No. 85,247.

in the same was ready of access and could be put 1n place or removed readily in case itV were broken.

In. my invention I have provided simple and inexpensive means for holding the prescription lens in the protection mounting whereby the prescription lens may be readily and easily inserted and readily and easily replaced when broken. i,

The lens rim 1 of theprotection mounting has a lens seat 2 and a flared lip 3, and is made of resilient material, such as thin resilient metal or resilient composition or fiber material. The protection lens l which is ordinarily a flat Vlens without power curves thereon, is inserted in the lens groove 2 by pushing it against the flared ends 3 of the rim 1. These flared ends act as cams and force outwardly the rim 1 until the lens enters on the seat 2. moved by pressing in the opposite direction forcing out the resilient ends of the lens rim 1. My prescription ylens 5 is insertedv in a frame 6 which isheld together by the end piece 7 and screw 8. This lens rim 6 has a flared inclined portion 9 angled to sit on one side of the inclined face of the lens seat 2.

To assemble my protection mounting I first place the lens 5 in the frame 6, bringing the end pieces 7 together and securing them there by the screw 8. I then place a flared portion 9 of the frame 6 in the lens seat 2 of the lens as shown in Figure 2, and then press my protection lens 4 against the fiared portion of the frame 1, thus springing it out and allowing the lens l to seat itself on the lens seat 2 on top of the flared portion 9 of the frame 6. To separate the parts I press outwardly on the flared portions 3 of the rim 1 until the lens 4 is free. By inverting the frame 1 the lens 4l will drop outand likewise the frame 6 holding the prescription lens 5. In cases where the prescription lens 5 has been broken I may remove the lens 4 by pressing on it from the inside, forcing it out through the cam action of its bevel face on the cam portions of the groove of the frame 1, removing at the. same time the frame 6 for holding the prescription lens 5.

Instead of making the portion. 3 of the frame 1 resilient and springy it may be made of ductile' material bent down over The lens may be rethe lens 4 atter the same is in place. To re- Inove the lens 4 and the lens 5 vl'roin this construction it will be necessarypt-o force up the portion 3 out of the Way of the edge of the lens allo\vingtlie reinoval. Instead of inalt-- ing the portion 3 a coinplete flange all around the periphery ot the rim l, I may make the portion 3 in the form of clips at separated spaces aronnd the periphery of the riin l, and these clips being of dnctile rnaterial are easily bent ont of place to taire ont the lens -t or 5. rlhe clips are indicated in dotted lines in Figure l by the nnnieral lO.

It Will be apparent from the foregoing description that l have provided simple` inexpensive and efficient means for carrying vout the objects and uses of this invention, particularly ready ineans of access for inserting` and rernoving Athe prescription lens.

Having described iny invention, l claim:

1. In a device of the character described, a lens rim having a lens groove with inclined Walls, the center of the groove being Lest/,isi

in the first rirn being held in place thereon by the lens snapped into the groove of the first rini by pressure, the outer portion of the. groove in the first rim acting ss a Acani face to spring the groove to enter the lens and an inner portion of the groove act-ing as a cam tace to spring the groove to take the lens' ont in the opposite direction.

3. ln a device ol the character described.

la lens riin having a lens groove, a second lens rim having an inclined portion resting in the lens groove of the first rini, a lens in the second lens rini. and a lens in the groove ot the rst lens rirn holding the inclined portion of the second riin in place in the groove of lthe first lens riIn.

il. ln a device of the character described, a lens riin having a lens groove, a second lens rini Vhaving a lens groove and an inclined portion resting in the groove of the first rini, a lens in the groove ot the second riin,

and a lens in the groove of the first riin holding in place the inclined portion of the second riin in the lens groove of the first riin. 5. ln a device ot the character described, a lens rim having a lens groove, a second lens rim comprising a split ring having a lens groove and an inclined portion resting in the lens groove of the first riniI` a lens in the groove of the second rim, means for securing the split ring together, and a lens in the groove of t-he first riin 'holding the iclined portion jof' the second riin .in place in thn oroove in the first Tini.

'EDGAR D. TILLYER. 

